Hey guys ive been searching my ass off on here and need some help.I bought a 03 silverado with 4.3 5 speed with 76,000 miles im wanting to throw in a 5.3 i know i need a 4.8 clutch and fly wheel but what year 5.3 and harness bc i dont have drive by wire i have a throttle cable and i found a good deal on a complete 01 5.3 with harness and any part i need but i dont wanna buy it if it wont work,im tryin to get all my stuff together before i start so im not searching for stuff i appreciate ur help and any tips would be great